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 ###Instrução: Qual é a cidade natal da Guarda Kerri Shields?
 ###Tabelas: CREATE TABLE tour_de_france_stage_finishes (tour_de_france_stage_finishes_id AUTO_INCREMENT PRIMARY KEY, Year INT, Stage INT, Start of stage VARCHAR, Distance (km) VARCHAR, Category VARCHAR, Stage winner VARCHAR, Yellow jersey VARCHAR) CREATE TABLE current_roster (current_roster_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Number INT, Position VARCHAR, Height VARCHAR, Year VARCHAR, Hometown VARCHAR) CREATE TABLE doubles_35_20-15 (doubles_35_20-15_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Partner VARCHAR, Opponents in the final VARCHAR, Score VARCHAR) CREATE TABLE lpga_tour_15 (lpga_tour_15_id AUTO_INCREMENT PRIMARY KEY, No. INT, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, To par VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR, Winners share ( $ ) INT) CREATE TABLE during_the_season (during_the_season_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Replaced by VARCHAR, Date of appointment VARCHAR, Position in table VARCHAR)  
SELECT Hometown FROM current_roster WHERE Position = guard AND Name = kerri shields